LASER SPECKLE REDUCTION IN OPHTHALMIC IMAGES, USING CURRENT PULSE-SHAPING
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United States of America Patent
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Issued Date -
Apr 4, 2024
app pub date -
Sep 21, 2023
filing date -
Sep 29, 2022
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Abstract
The eye imaging system for producing images with reduced speckle artifacts may comprise a laser diode for providing a beam of radiation to the eye; a detector for collecting light returning from the eye and generating output signals in response thereto, the detector having a sensor integration time; a driver circuit for applying a modulated drive signal to the laser diode, the modulated drive signal inducing a spectral broadening of the beam of radiation during the sensor integration time. The laser diode may be a single-mode laser designed to operate at a fixed current and wavelength. The drive signal may be modulated by shaping a drive current pulse. The drive signal may be modulated by imposing an RF modulation on a drive current pulse. The drive signal may be further modulated by shaping a drive current pulse.
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